| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | D | 6,277 | 4,792 | 11,215 | |
| 2020 | D | 7,382 | 4,625 | 12,136 | |
| 2016 | D | 6,945 | 4,027 | 11,267 | |
| 2012 | D | 7,777 | 3,999 | 11,895 | |
| 2008 | D | 7,591 | 3,912 | 11,619 | |
| 2004 | D | 5,764 | 3,531 | 9,435 | |
| 2000 | D | 5,263 | 3,011 | 8,398 | |
| 1996 | D | 4,719 | 2,414 | 7,476 | |
| 1992 | D | 4,867 | 2,518 | 8,091 | |
| 1988 | D | 3,827 | 2,714 | 6,583 | |
| 1984 | D | 4,117 | 3,147 | 7,287 | |
| 1980 | D | 4,153 | 2,098 | 6,323 | |
| 1976 | D | 4,153 | 1,817 | 5,988 | |
| 1972 | R | 2,492 | 2,608 | 5,146 | |
| 1968 | D | 3,011 | 1,619 | 5,966 | |
| 1964 | D | 2,628 | 1,997 | 4,625 | |
| 1960 | D | 1,633 | 1,549 | 3,182 | |
| 1956 | D | 961 | 519 | 2,648 | |
| 1952 | R | 1,590 | 1,607 | 3,197 | |
| 1948 | D | 211 | 63 | 1,349 | |
| 1944 | D | 798 | 21 | 863 | |
| 1940 | D | 848 | 20 | 868 | |
| 1936 | D | 1,005 | 0 | 1,018 | |
| 1932 | D | 901 | 0 | 914 | |
| 1928 | D | 781 | 94 | 875 | |
| 1924 | D | 631 | 11 | 644 | |
| 1920 | D | 737 | 15 | 752 | |
| 1916 | D | 726 | 0 | 738 | |
| 1912 | D | 622 | 0 | 633 | |
| 1908 | D | 830 | 12 | 844 | |
| 1904 | D | 723 | 0 | 723 | |
| 1900 | D | 670 | 17 | 687 | |
| 1896 | D | 1,078 | 54 | 1,132 | |
| 1892 | D | 1,041 | 243 | 1,289 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Fairfield County's population is roughly 60% Black, anchoring consistent Democratic margins in a state that trends heavily Republican statewide. Its shrinking population and high poverty rate make turnout mobilization a persistent variable in close cycles.
The Democratic margin in Fairfield County peaked at 100 points in 1904. By 1976 the county had flipped, voting Republican for the first time in many years. The 2024 margin was thirteen points, the most Democratic-leaning result in the county's modern history.
The economic context is the key. Fairfield County's median household income of $47,885 sits well below state and national norms, and 16% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country. The county's voting pattern over the last decade is most similar to that of San Miguel County and Hale County.